User Agent: Mozilla/5.0 (Windows NT 6.2; WOW64; rv:21.0) Gecko/20100101 Firefox/21.0 (Beta/Release) Build ID: 20130706191431 Steps to reproduce: using vs2013 to build firefox, I run into errors in media/webrtc/signaling. MediaPipeline.cpp d:\develop\mozilla\central\obj-12\media\webrtc\signaling\signaling_ecc\../../../ ../dist/include/mozilla-config.h(128) : warning C4005: “WINVER”: 宏重定义 命令行参数: 参见前面的“WINVER”定义 d:\develop\mozilla\central\obj-12\media\webrtc\signaling\signaling_ecc\../../../ ../dist/include/mozilla-config.h(135) : warning C4005: “_WIN32_WINNT”: 宏重定 义 命令行参数: 参见前面的“_WIN32_WINNT”定义 C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\INCLUDE\inttypes.h(237) : error C2084: 函数“__int64 abs(__int64) throw()”已有主体 C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\INCLUDE\stdlib.h( 501) : 参见“abs”的前一个定义 C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\INCLUDE\inttypes.h(242) : error C2556: “imaxdiv_t div(intmax_t,intmax_t)”: 重载函数与“lldiv_t div(__in t64,__int64) throw()”只是在返回类型上不同 C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\INCLUDE\stdlib.h( 509) : 参见“div”的声明 C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\INCLUDE\inttypes.h(242) : error C2371: “div”: 重定义；不同的基类型 C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\INCLUDE\stdlib.h( 509) : 参见“div”的声明 the inttypes.h is included by http://mxr.mozilla.org/mozilla-central/source/netwerk/srtp/src/crypto/include/integers.h#75 after I remove this line, the build can pass.